The International Laser Class Association (ILCA) has announced a redesigned sail for the ILCA 4 dinghy. The ILCA 4 MkII sail will launch commercially in April 2026.
The updated design aims to ensure long-term sailcloth availability, improve durability, and maintain one-design class integrity.
ILCA Chief Technical Officer Santiago Sampaio said the decision was driven by the need to “secure reliable long-term supply and maintain cost stability while preserving fairness, continuity, and compatibility.”
The original ILCA 4 sail relied on a 3.8 oz cloth that is no longer produced at scale. Its scarcity has put pressure on global supply chains, threatening access for youth sailors worldwide.
A direct cloth substitution was ruled out after technical testing showed it would lead to performance inconsistency. ILCA opted for a controlled redesign, keeping the same mast and boom.
The new sail features:
- Stronger 4.93 oz cloth
- Bi-radial panel construction
- A larger window for visibility
- Updated batten layout
- Reinforced patches
It also has a closer visual match to the ILCA 7 MkII sail for consistency across the MkII family.
A sailor trials the new ILCA 4 MkII sail, featuring a bi-radial cut and reinforced panels, designed for durability, consistency, and long-term one-design compliance across all regions.
The MkII sail will be class legal from August 2026, in time for the ILCA 4 World Championships. The current ILCA 4 MkI sail remains legal for use.
Performance testing was conducted across multiple regions and weight ranges. Sailors report a broader power range and better control, especially in variable wind conditions.
One European sailor noted, “It holds its shape really well so the power stays consistent... it feels like a big step forward.”
A U.S. coach added, “It seems to be faster than the previous one. Its shape provides more tuning options.”
The target sailor weight remains 55–65 kg. The updated sail places more emphasis on Cunningham control for full depowering.
World Sailing was involved from the early stages, approving the sail under its equipment policies.
Meanwhile, ILCA has begun work on a future ILCA 6 MkII sail. However, the current ILCA 6 sail will remain in use through the 2028 Olympics.
ILCA continues to uphold the one-design principle and Olympic values, ensuring fairness and global access for over 225,000 boats across 140 countries.
